Kiln for burning hydraulic cement



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No. 384,905. Patents June 19.1888

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v UNITED STATES PATENT OF IC CHARLES R. GOSTLING, OF WHITEHALL, ASSIGNOR OFONE-HALF TO SAML. B. WELLINGTON, OF OATASAUQUA, PENNSYLVANIA.

KILN FOR BURNING HYDRAULIC CEMENT.

SPECIFICATION forming part of Letters Patent No. 384,905, dated June 19,1888.

Application filed November 2, 1887. Serial No. 254,063. NomodeL) To all whom it may concern:

Be it known that I, CHARLES R. GOSTLING,

a citizen of the United States of America, residing at WVhitehall, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful Improvements in Kilns.

In the drawings, Figure 1 is a longitudinal sectional View of the kiln and drying-chamber.. Fig. 2 is a longitudinal sectional plan View, wherein a single drying-chamber is employed. Fig. 3 is a similar view showing two Fig. 4 is a front view of the double drying-chamber. Fig. 5 is'a similar view of a single dryingchamber. Fig. 6 is a vertical sectional view of the dryingchamberover the furnace. sectional view of the kiln with the supplemental drying-chamber.

A indicates the kiln in which the material is burned after it has been crushed and reduced to a powdered condition and to a plastic mass and afterward dried, as described in the application above referred to. The kiln A is by preference of the form of an inverted cone, having the grate-bars B and ash-pit Cat the lower portion. The lower portion of the kilnisprovided with asuitable openingthrough which the contents of the kiln are discharged after being burned, while an opening, D, is provided at the top, through which the material to be burned is supplied to the kiln. The upper end-of the kiln communicates with a drying arch or tunnel, E, whichis preferably about onehundred feet long and about the same width as kiln, supported on suitable arches of masonry, F, and communicates at its rear end Fig. 7 is a longitudinal with a stack or chimney, G. Thekiln A may communicate with a tunnel, asshown in Figs. 1, 2, 5, and 7, or, when it is desired toincrease the capacity of the kiln, it may be made sufficiently large to require two or more drying arches or tunnels, as shown in Figs. 3 and 4.

In the modification shown in Figs. 6 and 7 the drying-chamber is divided into two compartments, H and I. The chamber H receives the products of combustion directly from the kiln A to dry the materialplaced therein,

while in chamber I the material to be dried v does not come in contact with the products of combustion at all, as the waste heat passes through the flues or passages K under said chamber and escapes to the stack G.

It will be understood that after the liinestone has been ground and reduced to a finelydivided condition and to a plastic mass, as described in the application above named, it is transferred to the arches or tunnels E by at pump, or in any other suitable manner, where it is dried and afterward transferred to the kiln A, where it is burned to the required degree of heat.

Instead of transferring the plastic mass to the drying arches or tunnels in bulk, I may mold it into bricks or blocks for more convenient handling, or the mass may be placed in metal barrows or trolleys and run into the arches or tunnels, where, after drying,the barrows, with their contents, are taken to the kiln A, and the dried material deposited therein with the usual amount of fuel to effect a complete burning of the mass.

I may in some instances do the initial drying of .the plastic mass by means of steampipes before it is put into the tunnels or arches, and these steam-pipes may be arranged in a suitable chamber adapted to receive the plastic material. I also arrange the outlet for waste heat at rear end of kiln, so that it is drawn down over the mass in the tunnels or chambers, by which means the cement slips or bricks become perfectly dried before going in kiln.

I do not limit myself to drying cementslips or cement bricks or other body in a semiliquid state in tunnels or chambers leading from cement-kilns only, as such tunnels or chambers can be erected in connectionwith IPO other kilns, furnaces, or ovens, and other semiliquid bodies can be dried therein. Nor do I limit myself to making the bed or flooring of chamber or tunnel of the same width, as it may be wider at one end than at the other.

Having thus described my invention what I claim is- 1. An apparatus for drying and burning hydraulic cement, consisting of a vertical kiln opening at the top into a horizontal chamber, in which the slip is driedpreparatory to burning, and through which all the products of combustion from the kiln pass on their way to the smoke stack, as set forth. 

